9(a+b)²+6(a+b+1分解因式9(a+b)²+6(a+b)+1
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![9(a+b)²+6(a+b+1分解因式9(a+b)²+6(a+b)+1](/uploads/image/z/5251880-56-0.jpg?t=9%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B%2B6%EF%BC%88a%2Bb%2B1%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F9%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B%2B6%EF%BC%88a%2Bb%EF%BC%89%2B1)
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9(a+b)²+6(a+b+1分解因式9(a+b)²+6(a+b)+1
9(a+b)²+6(a+b+1
分解因式
9(a+b)²+6(a+b)+1
9(a+b)²+6(a+b+1分解因式9(a+b)²+6(a+b)+1
9(a+b)²+6(a+b)+1
=【3(a+b)+1】²
=(3a+3b+1)²